fix(android): correct EXIF orientation for non-JPEG camera captures

[GitToTheHub]

Platforms affected

Android

Motivation and Context

• MediaStore.ACTION_IMAGE_CAPTURE always writes JPEG data into the capture file, regardless of the requested encodingType/file extension. Deriving the source mimeType from that file's extension (via FileHelper.getMimeType) caused PNG-named captures to be misreported as image/png, so getScaledAndRotatedBitmap() skipped reading the EXIF orientation and correctOrientation had no effect.
• Use the actual JPEG mimeType for the captured source data instead, so orientation correction works regardless of the requested encodingType.
• Fixes correctOrientation: true is ignored for encodingType: PNG #974

Generated-By: Claude Sonnet 5

Description

Testing

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary